EP2414219B1 - Bow tank for lng transport vessel - Google Patents
Bow tank for lng transport vessel Download PDFInfo
- Publication number
- EP2414219B1 EP2414219B1 EP10716592.0A EP10716592A EP2414219B1 EP 2414219 B1 EP2414219 B1 EP 2414219B1 EP 10716592 A EP10716592 A EP 10716592A EP 2414219 B1 EP2414219 B1 EP 2414219B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tank
- bulkhead
- pillar
- ship
- strake
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000004888 barrier function Effects 0.000 claims description 30
- 239000003949 liquefied natural gas Substances 0.000 claims description 9
- 238000004873 anchoring Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000008602 contraction Effects 0.000 description 4
- 239000011120 plywood Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910001374 Invar Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
- B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
- B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
- B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
- B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
Definitions
- the present invention relates to the production of sealed and thermally insulated tanks integrated into a load-bearing structure, in particular the hull of a vessel intended for the sea transport of liquefied gases and, in particular, the transportation of liquefied natural gas (LNG) to high methane content.
- LNG liquefied natural gas
- each of the aforementioned walls comprises, from the inside of the tank to the outside of the tank, a primary watertight barrier, a primary heat-insulating barrier, a secondary watertight barrier and a secondary heat-insulating barrier.
- the primary watertight barrier and possibly the secondary watertight barrier are constituted respectively by metal strakes with raised edges towards the inside of the tank, said strakes being made of thin sheet of low coefficient of expansion and being welded edge to edge.
- the strakes 14 of the inclined wall 13 extend from the front wall 4 to the rear wall 5, parallel to the edge 15 formed by the edges of the walls 13 and 6.
- the strakes 14 are attached to the supporting structure via corner structures (not shown).
- the strakes 14 undergo a thermal contraction.
- the corresponding forces, represented by the arrows 16, are transmitted to the supporting structure, through the corner structures.
- the strakes extend parallel to the longitudinal direction of the ship 1, from the rear wall 5 to the front wall 4. Some of these strakes (not shown) extend to the wall 4. Other strakes 17 extend from the wall 5 to the edge 15, where they have a truncated edge. To recover the forces due to the thermal contraction, represented by the arrows 18, it is necessary to fix the strakes 17 to the supporting structure, at the edge 15. The same need appears at the edges formed respectively by the intersection of the walls 6 and 12, the walls 7 and 11 and the walls 7 and 10.
- the pillar 19 comprises a body 20 constituted by a stainless steel tube.
- the body 20 is fixed to the supporting structure via anchoring plates 21.
- the pillar 19 also comprises a primary plate 22 and a secondary plate 23.
- a primary block 24 is arranged at the primary plate 22 and a shim secondary 25 is arranged at the secondary plate 23.
- the secondary shim 25 serves to position the caissons forming the secondary thermally insulating barrier.
- the truncated end of a strake 17 is fixed on a plywood beam (not shown), itself secured to the pillar 19 via the primary wedge 24.
- the truncated end of a strake (not shown) of the secondary watertight barrier is welded to the plate 23.
- the shape of the tank 3 has the advantage of simplicity.
- this form has the disadvantage of reducing the carrying capacity of the ship 1 as well as complicating the architecture of the bow of the latter. It is therefore desirable to be able to use other shapes for the tip tank, in order to improve the transport capacity and simplify the architecture of the bow.
- a tip tank of another form should not be too complicated to manufacture with respect to the tip tank 3. Indeed, it is necessary to avoid that the advantages of this other form are canceled by the manufacturing difficulties.
- the document FR 2 826 630 describes a vessel comprising a tip tank of the same shape as the tip tank 3. This document proposes another arrangement for the Invar strakes of the wall of background. This arrangement involves the use of particular panels at the plane of symmetry of the bottom wall.
- a problem that the present invention proposes to solve is to provide a ship that does not exhibit at least some of the aforementioned drawbacks of the prior art.
- an object of the invention is to provide an advanced tank whose shape can improve the transport capacity and simplify the architecture of the bow.
- Another object of the invention is to provide such a tank that can be manufactured easily, limiting the number of elements to manufacture and assemble.
- the solution proposed by the invention is a vessel comprising a carrying structure and a sealed and thermally insulated tip tank for containing liquefied natural gas, said tip tank comprising a plurality of tank walls attached to said supporting structure, each tank wall.
- a primary watertight barrier, a primary heat-insulating barrier, a secondary watertight barrier and a secondary heat-insulating barrier presenting successively, in the direction of the thickness from the inside to the outside of said tip tank, a primary watertight barrier, a primary heat-insulating barrier, a secondary watertight barrier and a secondary heat-insulating barrier, a first wall and a second wall of said vessel walls being adjacent at one edge, the primary watertight barrier of said first wall comprising at least a first strake connected at said edge to said carrier structure via a pillar, characterized in that the primary watertight barrier of said second wall comprises end at least a second strake connected at said edge to said supporting structure via said pillar.
- two strakes of two adjacent walls can be connected, at their truncated ends, to the supporting structure by a single pillar.
- the number of pillars to be manufactured and installed is therefore limited.
- it allows to design a tank shape in which two adjacent walls have strakes connected at their truncated ends to the carrier structure at a common edge.
- a proposed tank shape makes it possible to increase the LNG transport capacity and to simplify the architecture of the bow of the vessel.
- said carrier structure has a first part parallel to said first wall and a second part parallel to said second wall, said pillar being fixed to said first part.
- the strakes of the two adjacent walls are connected to one and the same section of the supporting structure. This avoids the hyperstatism of the system.
- said pillar comprises at least one plate, said at least one plate having a first portion parallel to the first panel and a second portion parallel to the second panel, said first rack being attached to the pillar at said first portion and said second rack being attached to the pillar at said second portion.
- This structure makes it possible to have a first portion of the plate at the level of the first wall, and a second portion of the plate deported at the level of the second wall.
- said first strake is attached to a beam connected to said pillar, said pillar having a fallen edge preventing the beam from moving away from said first wall.
- the second strake can be attached to a beam behind a fallen edge. The beam and the dropped edge allow the pillar to take up a vertical component of the forces generated in the strakes.
- said tip tank comprises, among said plurality of tank walls, a ceiling wall and two inclined walls adjacent to the ceiling wall, said ceiling wall and said two inclined walls having a rectangular shape.
- Rectangular walls are easily achievable and do not involve the use of pillars.
- said first wall and said second wall have a trapezoidal shape and are respectively parallel and oblique with respect to a longitudinal direction of the ship.
- said first strake and said second strake extend respectively parallel and obliquely with respect to said longitudinal direction.
- This state-of-the-art tank shape increases the LNG transport capacity and simplifies the architecture of the bow of the vessel.
- the Figures 4 to 6 represent a tip tank 53 which has a shape different from the tip tank 3.
- the tip tank 53 comprises a front wall 54 and a bitter wall 55, perpendicular to the longitudinal direction of the ship.
- the tip tank 53 also includes a bottom wall 56, a ceiling wall 57, two side walls 58 and 59 and four inclined walls 60, 61, 62 and 63 that extend from the front wall 54 to the rear wall 55.
- the ceiling wall 57 and the inclined walls 60 and 61 are rectangular and parallel to the longitudinal direction of the ship.
- the tip tank 53 is identical to a standard cylindrical tank 2.
- the side walls 58 and 59, the inclined walls 62 and 63 as well as the bottom wall 56 have trapezoidal shapes.
- the walls 56, 58 and 59 are arranged parallel to the longitudinal direction of the vessel.
- the walls 62 and 63 are arranged obliquely with respect to the longitudinal direction of the ship.
- the shape of the tip tank 53 makes it possible to increase the LNG transport capacity and to simplify the architecture of the bow of the ship.
- each wall of the tip tank 53 comprises, from the inside of the tank to the outside of the tank, a primary watertight barrier, a primary thermally insulating barrier, a watertight barrier secondary and a secondary thermally insulating barrier.
- the primary watertight barrier and the secondary watertight barrier are constituted respectively by metal strakes with raised edges towards the inside of the tank, said strakes being made of thin sheet of low coefficient of expansion and being welded edge to edge.
- the strakes of the inclined wall 63 extend from the front wall 54 towards the rear wall 5, obliquely with respect to the longitudinal direction of the ship. Some of these strakes (not shown) extend to the rear wall 55. It can be seen on the figure 4 that other strakes 64 extend from the front wall 54 to the edge 65, formed by the intersection of the walls 63 and 56, where they have a truncated edge. To recover the forces due to the thermal contraction, represented by the arrows 66, it is necessary to fix the strakes 64 to the supporting structure, at the edge 65.
- the strakes extend parallel to the longitudinal direction of the ship, from the rear wall 55 to the front wall 54. Some of these strakes (not shown) extend to the wall 54. D Other strakes 61 extend from the wall 55 to the edge 65, where they have a truncated edge. To recover the forces due to the thermal contraction, represented by the arrows 68, it is necessary to fix the strakes 67 to the supporting structure, at the edge 15.
- edge 65 it is necessary to connect two sets of strakes to the supporting structure, one for each wall.
- the number of pillars to be manufactured and installed in the tank would be high. The manufacture of the tank would be tedious and expensive.
- the strakes 64 and the strakes 67 are connected to the carrier structure, at the edge 65, by a single series of pillars of a new design. These pillars are called "bi-oblique pillar" and an example is shown on Figures 7 and 8 .
- the pillar 69 comprises a body 70 constituted by a stainless steel tube.
- the body 70 is fixed to the supporting structure by means of anchoring plates 71.
- the supporting structure comprises in particular a panel 81, to which the bottom wall 56 is attached, and a panel 82, to which the inclined wall 63 is fastened.
- figure 8 also shows anchoring devices 83 for fixing a box (not shown) of the secondary thermally insulating barrier.
- the body 70 extends perpendicular to the pan 81 and the anchoring plates 71 are welded to the pan 81.
- the configuration of the body 70 and the anchoring plates 71 is the same as in the tip tank 3 of FIG. the prior art.
- the number of parts references in production is limited.
- it can use the same tools and methods for welding the anchor plates 71 and the body 70.
- the anchoring plates 71 allow, like the anchoring plates 11, a height adjustment.
- the pillar 69 also comprises a primary plate 72 and a secondary plate 73, fixed to the body 71.
- the primary plate 72 comprises a portion 78 parallel to the pan 81 and a portion 79 offset and parallel to the pan 82.
- the secondary plate 73 comprises a portion 80 parallel to the pan 81 and a portion 86 offset and parallel to the pan 82.
- Reinforcing plates 76 connect the body 70 to the second plate 73 and to the anchoring plates 71.
- a tube 77 connects the portion 86 of the second plate 73 to the portion 79 of the first plate 72.
- the reinforcing plates 76 and the tube 77 contribute to confer on the pillar 69 a rigid structure, for transmitting stresses stresses to pan 81 of the supporting structure.
- the pillar 69 makes it possible to anchor the strakes of two adjacent walls on one and the same panel of the supporting structure, the system's hyperstatism is avoided.
- Two primary shims 74 are arranged at the primary plate 72, respectively on the portions 78 and 79. Each primary shim 74 has a dropped edge 84.
- Two secondary shims 75 are arranged at the level of the secondary plate 73, respectively on the portions 80 and 86. Each secondary block 75 has a dropped edge 85.
- the truncated end of a strake 67 is fixed on a plywood beam (not shown), itself secured to the pillar 69 via the primary wedge 74 of the portion 78 and the truncated end of a strake. 64 is fixed on a plywood beam (not shown), itself secured to the pillar 69 via the primary wedge 74 of the portion 79.
- the truncated ends of the strakes (not shown) of the secondary sealed barrier are welded to the secondary plate 73, respectively on the portions 80 and 86.
- the pillar 69 can transmit the forces generated in the impervious barriers of the inclined wall 63, in addition to the forces generated in the impermeable barriers of the bottom wall 56.
- the number of pillars to be manufactured and installed is therefore limited.
- the manufacture of the tip tank 53 is thus simplified and less expensive.
- the ship manufacturer can use the same tools and processes as in the case of Pier 19, thus taking advantage of a dominated and approved technology.
- the forces represented by the arrows 66 and 68 comprise a vertical component, that is to say perpendicular to the pan 81.
- the plywood beams mentioned below are arranged under the dropped edges 84. Efforts are resumed at the primary level by the falling edge 84. At the secondary level, they are taken up by the welding of the strakes on the secondary plateau 73.
Description
La présente invention se rapporte à la réalisation de cuves étanches et thermiquement isolées intégrées dans une structure porteuse, notamment la coque d'un navire destiné au transport par mer des gaz liquéfiés et, en particulier, au transport des gaz naturels liquéfiés (GNL) à forte teneur en méthane.The present invention relates to the production of sealed and thermally insulated tanks integrated into a load-bearing structure, in particular the hull of a vessel intended for the sea transport of liquefied gases and, in particular, the transportation of liquefied natural gas (LNG) to high methane content.
-
La
figure 1 représente un navire 1 pour le transport par mer de GNL. Le navire 1 comprend trois ou quatre cuves cylindriques 2, de section octogonale, et une cuve de pointe 3, également appelée cuve n°1, qui épouse la forme de la proue du navire 1. Les cuves sont intégrées dans une structure porteuse constituée par la double coque du navire 1.Thefigure 1 represents a vessel 1 for the sea transport of LNG. The vessel 1 comprises three or fourcylindrical tanks 2, of octagonal section, and atank tip 3, also called tank No. 1, which matches the shape of the bow of the ship 1. The tanks are integrated into a carrying structure constituted by the double hull of the ship 1. -
La
figure 2 représente la cuve de pointe 3 de manière plus détaillée. Comme on peut le voir, la cuve de pointe 3 comprend une paroi avant 4 et une paroi arrière 5 perpendiculaires à la direction longitudinale du navire 1, une paroi de fond 6 et une paroi de plafond 7, deux parois latérales 8 et 9 et quatre parois inclinées 10, 11, 12 et 13 reliant les parois latérales aux parois de fond et de plafond.Thefigure 2 represents thetip tank 3 in more detail. As can be seen, thetip tank 3 comprises a front wall 4 and arear wall 5 perpendicular to the longitudinal direction of the ship 1, abottom wall 6 and a ceiling wall 7, two side walls 8 and 9 and four 10, 11, 12 and 13 connecting the side walls to the bottom and ceiling walls.inclined walls
De manière connue, chacune des parois précitées comprend, depuis l'intérieur de la cuve vers l'extérieur de la cuve, une barrière étanche primaire, une barrière thermiquement isolante primaire, une barrière étanche secondaire et une barrière thermiquement isolante secondaire.In known manner, each of the aforementioned walls comprises, from the inside of the tank to the outside of the tank, a primary watertight barrier, a primary heat-insulating barrier, a secondary watertight barrier and a secondary heat-insulating barrier.
La barrière étanche primaire et éventuellement la barrière étanche secondaire sont respectivement constituées par des virures métalliques à bords relevés vers l'intérieur de la cuve, lesdites virures étant réalisées en tôle mince à faible coefficient de dilatation et étant soudées bord à bord.The primary watertight barrier and possibly the secondary watertight barrier are constituted respectively by metal strakes with raised edges towards the inside of the tank, said strakes being made of thin sheet of low coefficient of expansion and being welded edge to edge.
On peut voir sur la
Sur la paroi de fond 6, les virures s'étendent parallèlement à la direction longitudinale du navire 1, de la paroi arrière 5 vers la paroi avant 4. Certaines de ces virures (non représentées) s'étendent jusqu'à la paroi 4. D'autres virures 17 s'étendent de la paroi 5 jusqu'à l'arête 15, où elles présentent un bord tronqué. Pour reprendre les efforts dus à la contraction thermique, représentés par les flèches 18, il est nécessaire de fixer les virures 17 à la structure porteuse, au niveau de l'arête 15. Le même besoin apparaît au niveau des arêtes formées respectivement par l'intersection des parois 6 et 12, des parois 7 et 11 et des parois 7 et 10.On the
De manière connue, la fixation de chaque virure 17 à la structure porteuse, au niveau de l'arête 15, est réalisée avec un pilier 19 représenté sur la
L'extrémité tronquée d'une virure 17 est fixée sur une poutre de contreplaqué (non représentée), elle-même solidarisée au pilier 19 par l'intermédiaire de la cale primaire 24. D'autre part, l'extrémité tronquée d'une virure (non représentée) de la barrière étanche secondaire est soudée sur le plateau 23.The truncated end of a
La forme de la cuve 3 présente l'avantage de la simplicité. Toutefois, cette forme présente l'inconvénient de réduire la capacité de transport du navire 1 ainsi que de compliquer l'architecture de la proue de ce dernier. Il est donc souhaitable de pouvoir utiliser d'autres formes pour la cuve de pointe, afin d'améliorer la capacité de transport et de simplifier l'architecture de la proue. Toutefois, une cuve de pointe d'une autre forme ne devrait pas être trop compliquée à fabriquer par rapport à la cuve de pointe 3. En effet, il faut éviter que les avantages de cette autre forme soient annulés par les difficultés de fabrication.The shape of the
Le document
Un problème que la présente invention propose de résoudre est de fournir un navire qui ne présente pas au moins certains des inconvénients précités de l'art antérieur. En particulier, un but de l'invention est de proposer une cuve de pointe dont la forme permet d'améliorer la capacité de transport et de simplifier l'architecture de la proue. Un autre but de l'invention est de fournir une telle cuve qui puisse être fabriquée facilement, en limitant le nombre d'éléments à fabriquer et assembler.A problem that the present invention proposes to solve is to provide a ship that does not exhibit at least some of the aforementioned drawbacks of the prior art. In particular, an object of the invention is to provide an advanced tank whose shape can improve the transport capacity and simplify the architecture of the bow. Another object of the invention is to provide such a tank that can be manufactured easily, limiting the number of elements to manufacture and assemble.
La solution proposée par l'invention est un navire comprenant une structure porteuse et une cuve de pointe étanche et thermiquement isolée destinée à contenir du gaz naturel liquéfié, ladite cuve de pointe comprenant plusieurs parois de cuve fixées à ladite structure porteuse, chaque paroi de cuve présentant successivement, dans le sens de l'épaisseur depuis l'intérieur vers l'extérieur de ladite cuve de pointe, une barrière étanche primaire, une barrière thermiquement isolante primaire, une barrière étanche secondaire et une barrière thermiquement isolante secondaire, une première paroi et une deuxième paroi parmi lesdites parois de cuve étant adjacentes au niveau d'une arête, la barrière étanche primaire de ladite première paroi comprenant au moins une première virure reliée, au niveau de ladite arête, à ladite structure porteuse par l'intermédiaire d'un pilier, caractérisé par le fait que la barrière étanche primaire de ladite deuxième paroi comprend au moins une deuxième virure reliée, au niveau de ladite arête, à ladite structure porteuse par l'intermédiaire dudit pilier.The solution proposed by the invention is a vessel comprising a carrying structure and a sealed and thermally insulated tip tank for containing liquefied natural gas, said tip tank comprising a plurality of tank walls attached to said supporting structure, each tank wall. presenting successively, in the direction of the thickness from the inside to the outside of said tip tank, a primary watertight barrier, a primary heat-insulating barrier, a secondary watertight barrier and a secondary heat-insulating barrier, a first wall and a second wall of said vessel walls being adjacent at one edge, the primary watertight barrier of said first wall comprising at least a first strake connected at said edge to said carrier structure via a pillar, characterized in that the primary watertight barrier of said second wall comprises end at least a second strake connected at said edge to said supporting structure via said pillar.
Grâce à ces caractéristiques, deux virures de deux parois adjacentes peuvent être reliées, au niveau de leurs extrémités tronquées, à la structure porteuse par un unique pilier. Le nombre de piliers à fabriquer et installer est donc limité. De plus, cela permet de concevoir une forme de cuve dans laquelle deux parois adjacentes présentent des virures reliées, au niveau de leurs extrémités tronquées, à la structure porteuse au niveau d'une arête commune. Une forme de cuve proposée permet d'augmenter la capacité de transport de GNL et de simplifier l'architecture de la proue du navire.Thanks to these characteristics, two strakes of two adjacent walls can be connected, at their truncated ends, to the supporting structure by a single pillar. The number of pillars to be manufactured and installed is therefore limited. In addition, it allows to design a tank shape in which two adjacent walls have strakes connected at their truncated ends to the carrier structure at a common edge. A proposed tank shape makes it possible to increase the LNG transport capacity and to simplify the architecture of the bow of the vessel.
De préférence, ladite structure porteuse présente un premier pan parallèle à ladite première paroi et un deuxième pan parallèle à ladite deuxième paroi, ledit pilier étant fixé audit premier pan.Preferably, said carrier structure has a first part parallel to said first wall and a second part parallel to said second wall, said pillar being fixed to said first part.
Dans ce cas, les virures des deux parois adjacentes sont reliées à un même pan de la structure porteuse. On évite ainsi l'hyperstatisme du système.In this case, the strakes of the two adjacent walls are connected to one and the same section of the supporting structure. This avoids the hyperstatism of the system.
Avantageusement, ledit pilier comprend au moins un plateau, ledit au moins un plateau présentant une première portion parallèle au premier pan et une deuxième portion parallèle au deuxième pan, ladite première virure étant fixée au pilier au niveau de ladite première portion et ladite deuxième virure étant fixée au pilier au niveau de ladite deuxième portion.Advantageously, said pillar comprises at least one plate, said at least one plate having a first portion parallel to the first panel and a second portion parallel to the second panel, said first rack being attached to the pillar at said first portion and said second rack being attached to the pillar at said second portion.
Cette structure permet d'avoir une première portion du plateau au niveau de la première paroi, et une deuxième portion du plateau déportée au niveau de la deuxième paroi.This structure makes it possible to have a first portion of the plate at the level of the first wall, and a second portion of the plate deported at the level of the second wall.
Selon un mode de réalisation, ladite première virure est fixée à une poutre reliée audit pilier, ledit pilier présentant un bord tombé empêchant la poutre de s'éloigner de ladite première paroi. De même, la deuxième virure peut être fixée à une poutre située derrière un bord tombé. La poutre et le bord tombé permettent au pilier de reprendre une composante verticale des efforts générés dans les virures.According to one embodiment, said first strake is attached to a beam connected to said pillar, said pillar having a fallen edge preventing the beam from moving away from said first wall. Similarly, the second strake can be attached to a beam behind a fallen edge. The beam and the dropped edge allow the pillar to take up a vertical component of the forces generated in the strakes.
De préférence, ladite cuve de pointe comprend, parmi lesdites plusieurs parois de cuve, une paroi de plafond et deux parois inclinées adjacentes à la paroi de plafond, ladite paroi de plafond et lesdites deux parois inclinées présentant une forme rectangulaire.Preferably, said tip tank comprises, among said plurality of tank walls, a ceiling wall and two inclined walls adjacent to the ceiling wall, said ceiling wall and said two inclined walls having a rectangular shape.
Les parois de forme rectangulaire sont facilement réalisables et n'impliquent pas l'utilisation de piliers.Rectangular walls are easily achievable and do not involve the use of pillars.
Avantageusement, ladite première paroi et ladite deuxième paroi présentent une forme trapézoïdale et sont respectivement parallèle et oblique par rapport à une direction longitudinale du navire.Advantageously, said first wall and said second wall have a trapezoidal shape and are respectively parallel and oblique with respect to a longitudinal direction of the ship.
Selon un mode de réalisation particulier, ladite première virure et ladite deuxième virure s'étendent respectivement parallèlement et obliquement par rapport à ladite direction longitudinale.According to a particular embodiment, said first strake and said second strake extend respectively parallel and obliquely with respect to said longitudinal direction.
Cette forme de cuve de pointe permet d'augmenter la capacité de transport de GNL et de simplifier l'architecture de la proue du navire.This state-of-the-art tank shape increases the LNG transport capacity and simplifies the architecture of the bow of the vessel.
L'invention sera mieux comprise, et d'autres buts, détails, caractéristiques et avantages de celle-ci apparaîtront plus clairement au cours de la description suivante d'un mode de réalisation particulier de l'invention, donné uniquement à titre illustratif et non limitatif, en référence aux dessins annexés. Sur ces dessins :
- la
figure 1 est une vue en perspective d'un navire de transport de GNL selon l'art antérieur, - la
figure 2 est une vue en perspective de la cuve n°1 du navire de lafigure 1 , - la
figure 3 est une vue en perspective d'un pilier de la cuve de lafigure 2 , - la
figure 4 est une vue en perspective d'une cuve selon un mode de réalisation de l'invention, - les
figures 5 et 6 sont des vues en coupe de la cuve de lafigure 4 , et - les
figures 7 et 8 sont des vues, respectivement en perspective et - de côté, d'un pilier de la cuve de la
figure 4 .
- the
figure 1 is a perspective view of an LNG transport vessel according to the prior art, - the
figure 2 is a perspective view of the tank # 1 of the ship of thefigure 1 , - the
figure 3 is a perspective view of a pillar of the tank of thefigure 2 , - the
figure 4 is a perspective view of a tank according to one embodiment of the invention, - the
Figures 5 and 6 are sectional views of the tank of thefigure 4 , and - the
Figures 7 and 8 are views, respectively in perspective and - side, a pillar of the tank of the
figure 4 .
Les
La cuve de pointe 53 comprend une paroi avant 54 et une paroi amère 55, perpendiculaires à la direction longitudinale du navire. La cuve de pointe 53 comprend également une paroi de fond 56, une paroi de plafond 57, deux parois latérales 58 et 59 et quatre parois inclinées 60, 61, 62 et 63 qui s'étendent de la paroi avant 54 à la paroi arrière 55The
On peut voir que la paroi de plafond 57 et les parois inclinées 60 et 61 sont rectangulaires et parallèles à la direction longitudinale du navire. Autrement dit, en partie haute, la cuve de pointe 53 est identique à une cuve cylindrique 2 standard.It can be seen that the
En partie basse, les parois latérales 58 et 59, les parois inclinées 62 et 63 ainsi que la paroi de fond 56 présentent des formes trapézoïdales Les parois 56, 58 et 59 sont agencées parallèlement à la direction longitudinale du navire Les parois 62 et 63 sont agencées obliquement par rapport à la direction longitudinale du navire.In the lower part, the
Par rapport à la cuve de pointe 3, la forme de la cuve de pointe 53 permet d'augmenter la capacité de transport de GNL et de simplifier l'architecture de la proue du navire.With respect to the
Comme dans le cas de la cuve de pointe 3, chaque paroi de la cuve de pointe 53 comprend, depuis l'intérieur de la cuve vers l'extérieur de la cuve, une barrière étanche primaire, une barrière thermiquement isolante primaire, une barrière étanche secondaire et une barrière thermiquement isolante secondaire. La barrière étanche primaire et la barrière étanche secondaire sont respectivement constituées par des virures métalliques à bords relevés vers l'intérieur de la cuve, lesdites virures étant réalisées en tôle mince à faible coefficient de dilatation et étant soudées bord à bord.As in the case of the
Les virures de la paroi inclinée 63 s'étendent de la paroi avant 54 vers la paroi arrière 5, obliquement par rapport à la direction longitudinale du navire. Certaines de ces virures (non représentées) s'étendent jusqu'à la paroi arrière 55. On peut voir sur la
Sur la paroi de fond 56, les virures s'étendent parallèlement à la direction longitudinale du navire, de la paroi arrière 55 vers la paroi avant 54. Certaines de ces virures (non représentées) s'étendent jusqu'à la paroi 54. D'autres virures 61 s'étendent de la paroi 55 jusqu'à l'arête 65, où elles présentent un bord tronqué. Pour reprendre les efforts dus à la contraction thermique, représentés par les flèches 68, il est nécessaire de fixer les virures 67 à la structure porteuse, au niveau de l'arête 15.On the
Autrement dit, au niveau de l'arête 65, il est nécessaire de relier deux séries de virures à la structure porteuse, une pour chaque paroi. Le même besoin apparaît au niveau des arêtes formées respectivement par l'intersection des parois 56 et 62, des parois 62 et 58 et des parois 63 et 59.In other words, at the
Une solution simple, en terme de conception, consisterait à utiliser, au niveau de l'arête 65, deux séries de piliers identiques au pilier 19, chaque série de piliers servant à relier les virures d'une paroi respective à la structure porteuse. Toutefois, le nombre de piliers à fabriquer et installer dans la cuve serait élevé. La fabrication de la cuve serait donc fastidieuse et coûteuse.A simple solution, in terms of design, would be to use, at the
C'est pourquoi, selon un mode de réalisation de l'invention, les virures 64 et les virures 67 sont reliées à la structure porteuse, au niveau de l'arête 65, par une unique série de piliers d'une nouvelle conception. Ces piliers sont appelés « pilier bi-oblique » et un exemple est représenté sur les
Le pilier 69 comprend un corps 70 constitué par un tube en acier inoxydable. Le corps 70 est fixé à la structure porteuse par l'intermédiaire de plats d'ancrage 71. Sur la
Le pilier 69 comprend également un plateau primaire 72 et un plateau secondaire 73, fixé au corps 71. Le plateau primaire 72 comprend une portion 78 parallèle au pan 81 et une portion 79 déportée et parallèle au pan 82. Le plateau secondaire 73 comprend une portion 80 parallèle au pan 81 et une portion 86 déportée et parallèle au pan 82.The
Des plaques de renfort 76 relient le corps 70 au deuxième plateau 73 et aux plats d'ancrage 71. Un tube 77 relie la portion 86 du deuxième plateau 73 à la portion 79 du premier plateau 72. Les plaques de renfort 76 et le tube 77 contribuent à conférer au pilier 69 une structure rigide, permettant de transmettre les efforts des virures au pan 81 de la structure porteuse. De plus, comme le pilier 69 permet d'effectuer un ancrage des virures de deux parois adjacentes sur un même pan de la structure porteuse, on évite l'hyperstatisme du système.Reinforcing
Deux cales primaires 74 sont agencées au niveau du plateau primaire 72, respectivement sur les portions 78 et 79. Chaque cale primaire 74 présente un bord tombé 84. Deux cales secondaires 75 sont agencées au niveau du plateau secondaire 73, respectivement sur les portions 80 et 86. Chaque cale secondaire 75 présente un bord tombé 85.Two
L'extrémité tronquée d'une virure 67 est fixée sur une poutre de contreplaqué (non représentée), elle-même solidarisée au pilier 69 par l'intermédiaire de la cale primaire 74 de la portion 78 et l'extrémité tronquée d'une virure 64 est fixée sur une poutre de contreplaqué (non représentée), elle-même solidarisée au pilier 69 par l'intermédiaire de la cale primaire 74 de la portion 79. D'autre part, les extrémités tronquées des virures (non représentées) de la barrière étanche secondaire sont soudées au plateau secondaire 73, respectivement sur les portions 80 et 86. Ainsi, grâce à la portion 79 du plateau primaire 72 et à la portion 86 du plateau secondaire 73, le pilier 69 permet de transmettre les efforts générés dans les barrières étanches de la paroi inclinée 63, en plus des efforts générés dans les barrières étanches de la paroi de fond 56. Le nombre de piliers à fabriquer et à installer est donc limité. La fabrication de la cuve de pointe 53 est donc simplifiée et moins coûteuse. De plus, pour souder les virures aux cales, le fabricant de navire peut utiliser les mêmes outils et procédés que dans le cas du pilier 19, tirant ainsi profit d'une technologie dominée et approuvée.The truncated end of a
En regardant la
Bien que l'invention ait été décrite en liaison avec un mode de réalisation particulier, il est bien évident qu'elle n'y est nullement limitée et qu'elle comprend tous les équivalents techniques des moyens décrits ainsi que leurs combinaisons si celles-ci entrent dans le cadre de l'invention.Although the invention has been described in connection with a particular embodiment, it is obvious that it is not limited thereto and that it comprises all the technical equivalents of the means described and their combinations if they are within the scope of the invention.
Claims (5)
- Ship including a bearing structure and a sealed and heat insulated bow tank (53) designed to contain liquefied natural gas, said bow tank having several tank bulkheads (54, 55, 56, 57, 58, 59, 60, 61, 62, 63) attached to said bearing structure with each tank bulkhead having successively, in the direction of the thickness, from the inside to the outside of said bow tank, a primary sealed barrier, a primary heat insulating barrier, a secondary sealed barrier and a secondary heat insulating barrier, a first bulkhead (56) and a second bulkhead (63) among the said tank bulkheads, being adjacent to a ridge, the first bulkhead (56) and the second bulkhead (63) having a trapezoid shape and being respectively parallel and oblique to a longitudinal direction of the ship in such a manner that the ridge (65) extends obliquely to the longitudinal direction of the ship, the primary sealed barrier of said first bulkhead including at least a first strake (67) extending in parallel to the longitudinal direction of the ship and having a truncated end at the ridge, the first strake (67) being connected at said ridge to said bearing structure by a pillar (69), characterised by the fact that the primary sealed barrier of said second bulkhead includes at least a second strake (64) extending in oblique to the longitudinal direction of the ship and having a truncated end at the ridge, the second strake being connected at said ridge to said bearing structure by means of said pillar (69).
- Ship according to the previous claim in which said bearing structure has a first section (81) parallel to said first bulkhead and a second section (82) parallel to said second bulkhead with said pillar being attached to said first section.
- Ship according to the previous claim in which said pillar includes at least one plate (72, 73) said one plate having a first portion (78, 80) parallel to the first section and a second portion (79, 86) parallel to the second section said first strake being attached to the pillar at first portion and said second strake being attached to the pillar at said second portion.
- Ship according to one of the previous claims in which said first strake is attached to a beam connected to said pillar, said pillar having a dropped edge (84) preventing the beam from moving away from said first bulkhead.
- Ship according to one of the previous claims in which said bow tank includes among said several bulkheads of the tank, a ceiling bulkhead (57) and two inclined bulkheads (60, 61) adjacent to the ceiling bulkhead said ceiling bulkhead and said two inclined bulkheads being rectangular in shape.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0952046A FR2943616B1 (en) | 2009-03-31 | 2009-03-31 | BI-OBLIQUE POINT TANK FOR LNG. |
PCT/FR2010/050573 WO2010112748A1 (en) | 2009-03-31 | 2010-03-29 | Bi-oblique tip tank for lng |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2414219A1 EP2414219A1 (en) | 2012-02-08 |
EP2414219B1 true EP2414219B1 (en) | 2013-08-14 |
Family
ID=41599352
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10716592.0A Active EP2414219B1 (en) | 2009-03-31 | 2010-03-29 | Bow tank for lng transport vessel |
Country Status (12)
Country | Link |
---|---|
EP (1) | EP2414219B1 (en) |
JP (1) | JP5599006B2 (en) |
KR (1) | KR101430063B1 (en) |
CN (1) | CN102300769B (en) |
AU (1) | AU2010231306C1 (en) |
BR (1) | BRPI1009985A2 (en) |
ES (1) | ES2435252T3 (en) |
FR (1) | FR2943616B1 (en) |
MY (1) | MY154121A (en) |
RU (1) | RU2518121C2 (en) |
SG (1) | SG172828A1 (en) |
WO (1) | WO2010112748A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SG11201404765QA (en) | 2012-02-22 | 2014-10-30 | Grace W R & Co | Functionalized polyamines for clay mitigation |
MX368567B (en) | 2012-05-04 | 2019-10-04 | Gcp Applied Tech Inc | Method for treating clay and clay-bearing aggregates and compositions therefor. |
US10526052B2 (en) * | 2015-10-27 | 2020-01-07 | Hyundai Heavy Industries Co., Ltd. | Liquefied gas carrier |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU950585A1 (en) * | 1979-02-08 | 1982-08-15 | Николаевский Ордена Трудового Красного Знамени Кораблестроительный Институт Им.Адмирала С.О.Макарова | Ship for carrying liquefied gases under atmospheric pressure |
JP2771092B2 (en) * | 1993-03-17 | 1998-07-02 | 日立造船株式会社 | Transport tank |
JP2922085B2 (en) * | 1993-03-17 | 1999-07-19 | 日立造船株式会社 | Transport tank |
FR2709725B1 (en) | 1993-09-09 | 1995-11-10 | Gaz Transport | Watertight and thermally insulating tank integrated into the supporting structure of a ship having a simplified angle structure. |
FR2724623B1 (en) | 1994-09-20 | 1997-01-10 | Gaztransport Et Technigaz | IMPROVED WATERPROOF AND THERMALLY INSULATING TANK INTEGRATED INTO A CARRIER STRUCTURE |
US5727492A (en) * | 1996-09-16 | 1998-03-17 | Marinex International Inc. | Liquefied natural gas tank and containment system |
JP2001063681A (en) * | 1999-08-25 | 2001-03-13 | Mitsubishi Heavy Ind Ltd | Thermal insulation box mounting structure for liquefied natural gas tank |
FR2813111B1 (en) * | 2000-08-18 | 2002-11-29 | Gaz Transport & Technigaz | WATERPROOF AND THERMALLY INSULATING TANK IMPROVED LONGITUDINAL AREAS |
FR2826630B1 (en) * | 2001-06-29 | 2003-10-24 | Gaz Transport & Technigaz | WATERPROOF AND THERMALLY INSULATING TANK WITH LONGITUDINAL OBLIQUE AREAS |
KR100977647B1 (en) * | 2002-03-28 | 2010-08-24 | 에스티엑스 핀란드 오와이 | Method for reducing the weight and optimizing the longitudinal strength of a water-craft and water-craft thereof |
FR2861060B1 (en) * | 2003-10-16 | 2006-01-06 | Gaz Transport & Technigaz | WATERPROOF STRUCTURE AND TANK PROVIDED WITH SUCH A STRUCTURE |
US7137345B2 (en) * | 2004-01-09 | 2006-11-21 | Conocophillips Company | High volume liquid containment system for ships |
DE102005057451A1 (en) * | 2005-12-01 | 2007-06-14 | Tge Gas Engineering Gmbh | Device for storing a tank in a ship |
-
2009
- 2009-03-31 FR FR0952046A patent/FR2943616B1/en not_active Expired - Fee Related
-
2010
- 2010-03-29 RU RU2011136956/11A patent/RU2518121C2/en active
- 2010-03-29 AU AU2010231306A patent/AU2010231306C1/en active Active
- 2010-03-29 BR BRPI1009985A patent/BRPI1009985A2/en not_active IP Right Cessation
- 2010-03-29 CN CN201080005945.2A patent/CN102300769B/en active Active
- 2010-03-29 SG SG2011048493A patent/SG172828A1/en unknown
- 2010-03-29 MY MYPI2011004665A patent/MY154121A/en unknown
- 2010-03-29 JP JP2012502744A patent/JP5599006B2/en active Active
- 2010-03-29 WO PCT/FR2010/050573 patent/WO2010112748A1/en active Application Filing
- 2010-03-29 KR KR1020117023100A patent/KR101430063B1/en active IP Right Grant
- 2010-03-29 EP EP10716592.0A patent/EP2414219B1/en active Active
- 2010-03-29 ES ES10716592T patent/ES2435252T3/en active Active
Also Published As
Publication number | Publication date |
---|---|
BRPI1009985A2 (en) | 2016-03-15 |
CN102300769A (en) | 2011-12-28 |
SG172828A1 (en) | 2011-08-29 |
KR20110137789A (en) | 2011-12-23 |
AU2010231306B2 (en) | 2013-08-29 |
WO2010112748A1 (en) | 2010-10-07 |
JP2012521929A (en) | 2012-09-20 |
AU2010231306A1 (en) | 2011-10-13 |
CN102300769B (en) | 2014-07-02 |
MY154121A (en) | 2015-05-15 |
RU2518121C2 (en) | 2014-06-10 |
EP2414219A1 (en) | 2012-02-08 |
KR101430063B1 (en) | 2014-08-13 |
RU2011136956A (en) | 2013-03-20 |
AU2010231306C1 (en) | 2014-03-06 |
FR2943616A1 (en) | 2010-10-01 |
ES2435252T3 (en) | 2013-12-17 |
JP5599006B2 (en) | 2014-10-01 |
FR2943616B1 (en) | 2012-07-20 |
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